Centre for Biomolecular Sciences, School of Pharmacy, University of Nottingham, Nottingham, NG7 2RD, (UK)

Email: S. J. B. Tendler (saul.tendler@nottingham.ac.uk)

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We thank Prof. C. Gorbitz of the Department of Chemistry, University of Oslo, for supplying us with structural data from his recent model of the FF nanotube. We are grateful to Prof. Richard Bowtell of the School of Physics and Astronomy, University of Nottingham, for the use of the 3 and 7 T magnetic resonance imaging magnets and for his helpful comments. V.L.S thanks the UK Biotechnology and Biological Sciences Research Council for supporting her doctoral studies. E.G. thanks the Israel Science Foundation (F.I.R.S.T program) for financial support. We acknowledge the financial support of the EU Benatural project. Supporting Information is available online from Wiley InterScience or from the author.